When a clinical decision support system (CDSS) or other ancillary system detects an abnormal or problematic condition, healthcare providers must be notified in a timely manner so that appropriate corrective action can be taken. Delivery of clinical alerts to the appropriate providers is the role of a notification system.1,2 The content generating system must therefore communicate to the notification system the content to be delivered and any additional directives regarding the resulting notifications. This work is sanctioned by the Health Level Seven, Inc., Clinical Decision Support Technical Committee (CDS TC) and is based on previous proposals to the CDS TC.3 The proposed message model is presented as an XML schema.4